Simulated Effects of Atmospheric Deposition and Species Change on Nutrient Cycling in Loblolly Pine and Mixed Deciduous Forests

  • Dale W. Johnson
  • Richard B. Susfalk
  • Wayne T. Swank
Part of the Ecological Studies book series (ECOLSTUD, volume 128)


Forest soils of the South, similar to those in several other parts of the world, are undergoing changes that may have bearing upon the future health and productivity of southern forest ecosystems (Johnson et al., 1988, 1991; Binkley et al., 1989; Knoepp and Swank, 1994; Richter et al., 1994). In contrast to earlier indications that soil-nutrient pools were very large and therefore buffered from short-term changes, several studies both in the southeastern United States and elsewhere have shown that soils are changing on the time-scale of decades, and, in some cases, on a seasonal basis. Significant reductions in the pools of exchangeable base cations have been noted over periods of one to three decades in both deciduous (Johnson et al., 1988; Knoepp and Swank, 1994) and loblolly pine (Binkley et al., 1989; Richter et al., 1994) forests of the southeastern United States. Surface soil concentrations have also been shown to vary on a seasonal basis (Haines and Cleveland, 1981; Johnson et al., 1988). These changes have been attributed to sequestration of base cations (especially calcium (Ca)) in biomass and to leaching, the latter of which is accelerated by atmospheric deposition (Johnson and Todd, 1990; Knoepp and Swank, 1994; Richter et al., 1994).


Atmospheric Deposition Base Cation Simulated Effect Species Change Exchangeable Base Cation 
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© Springer-Verlag New York, Inc. 1998

Authors and Affiliations

  • Dale W. Johnson
  • Richard B. Susfalk
  • Wayne T. Swank

There are no affiliations available

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